|Year : 2021 | Volume
| Issue : 6 | Page : 610-622
Glycemic Excursion, Adverse Drug Reactions, and Self-Management in Diabetes Patients Undergoing Chemotherapy: A Literature Review
Naoko Terao1, Kumi Suzuki2
1 Graduate School of Nursing Doctoral Program; Faculty of Nursing, Osaka Medical and Pharmaceutical University, Osaka, Japan
2 Faculty of Nursing, Osaka Medical and Pharmaceutical University, Osaka, Japan
|Date of Submission||19-Apr-2021|
|Date of Acceptance||20-Jul-2021|
|Date of Web Publication||04-Oct-2021|
Graduate School of Nursing Doctoral Program, Osaka Medical and Pharmaceutical University, Osaka
Source of Support: None, Conflict of Interest: None
The purpose of this study was to identify the state of self-management in patients with diabetes who underwent chemotherapy, by referring to fluctuations in glycemic excursion and adverse drug reaction. We conducted a literature search in May 2021 using PubMed, CINAHL, and Ichushi-Web databases with “Cancer AND Diabetes AND Chemotherapy” as keywords. Based on our criteria, 25 articles were selected, and a review matrix sheet was created for the analysis of fluctuations in glycemic excursion and any adverse drug reaction to diabetes in patients undergoing chemotherapy. Substantial increases and unpredictable fluctuations in glycemic excursion were observed in these patients. In addition, an increase or change in the treatment dose was prevalent. Primarily, peripheral neuropathy and infection were reported as common adverse drug reactions. The risk of adverse drug reactions was especially high for patients with diabetes undergoing chemotherapy; furthermore, among this cohort, the detrimental effects were more likely to exacerbate into a severe condition that required special attention. Almost inevitably, the implementation rate of diabetes self-management programs decreased on the 8th week after the commencement of chemotherapy. Considering the findings of large individual differences in fluctuation in this cohort, tailored assistance that is appropriate for each patient's chemotherapy regimen or blood glucose level is of paramount importance. Support of patient self-management to achieve stable blood glucose levels and thus prevent adverse drug reactions was a key component in the successful completion of chemotherapy and improved patient outcomes for this group of special needs patients.
Keywords: Adverse drug reaction, chemotherapy, glycemic excursion, patients with both cancer and diabetes, self-management
|How to cite this article:|
Terao N, Suzuki K. Glycemic Excursion, Adverse Drug Reactions, and Self-Management in Diabetes Patients Undergoing Chemotherapy: A Literature Review. Asia Pac J Oncol Nurs 2021;8:610-22
|How to cite this URL:|
Terao N, Suzuki K. Glycemic Excursion, Adverse Drug Reactions, and Self-Management in Diabetes Patients Undergoing Chemotherapy: A Literature Review. Asia Pac J Oncol Nurs [serial online] 2021 [cited 2021 Oct 23];8:610-22. Available from: https://www.apjon.org/text.asp?2021/8/6/610/327470
| Introduction|| |
Worldwide, the number of patients with both diabetes and cancer has been increasing., In Japan, the leading cause of death among patients with diabetes from 2001 to 2010 was malignant neoplasm, accounting for about 38% of all cases. In the United States, malignant neoplasms are the second leading cause of death in patients with diabetes, accounting for approximately 20% of all cases. Thus, malignant neoplasms are the leading cause of death in patients with diabetes. Since 90% of patients with diabetes are suffering from type 2 diabetes mellitus, it is reasonable to speculate that patients with both cancer and complications of type 2 diabetes mellitus are similarly on the rise. It is critical for type 2 diabetes mellitus patients to improve their daily lifestyle habits and maintain stable blood glucose and blood pressure levels to prevent the onset and worsening of diabetes-related complications and atherosclerotic diseases., However, improving lifestyle habits is not only difficult to change but also affects interpersonal relationships, work, and roles. Therefore, even if the need is known, it is difficult to put it into action.,, For this reason, self-management of patients with type 2 diabetes is focused on behavior change, motivation, and self-efficacy. In contrast, the introduction of self-management programs, appropriate for the specific treatment of tumors based on their location, is crucial for patients with cancer., As a result, when patients with diabetes are diagnosed with cancer and undergoing chemotherapy, they are forced to manage both diabetes and chemotherapy side effects, which increases the difficulty and complexity of self-management. Previous studies have reported that patients with diabetes undergoing chemotherapy experienced a decrease in self-management of diabetes 8 weeks after the start of chemotherapy. Moreover, patients experienced more glycemic variability and dietary changes during treatment compared to before cancer treatment. Diabetes mellitus has been shown to negatively affect the quality of life of physical and mental functions of patients undergoing chemotherapy. As shown above, chemotherapy in patients with type 2 diabetes mellitus leads to difficulties in self-management and deterioration of patients' quality of life.
Especially for patients with diabetes who underwent chemotherapy, corticosteroids (steroids) used for antiemetic and allergy prevention can cause hyperglycemia. This risk of hyperglycemia or hypoglycemia associated with chemotherapy is alarming, particularly because accidents involving disorders of consciousness due to hyperglycemia or bone fracture owing to falls caused by hypoglycemia have been reported, and some of these cases can indeed be fatal. Clearly, controlling blood glucose levels during chemotherapy is a matter of life or death to patients with both cancer and diabetes. Physical weariness, susceptibility to infection, or diabetic neuropathy manifest simultaneously with adverse drug reactions to chemotherapy; this further exacerbates patient health and makes the continuation of chemotherapy difficult. Thus, the self-management of blood glucose levels and adverse drug reactions to chemotherapy become a key component of the safe completion of chemotherapy for patients with diabetes. Despite its relevance and effect on patient outcomes, the self-management issues concerning fluctuation in blood glucose levels or adverse drug reaction to chemotherapy of patients with diabetes have largely been overlooked. Therefore, the purpose of the present literature review was to illuminate the state of self-management among patients with diabetes undergoing chemotherapy in relation to fluctuation in their blood glucose levels or adverse drug reactions.
| Methods|| |
We used PubMed, CINAHL, and Ichushi-Web databases to conduct a literature search in May 2021 with the following keywords: “Cancer AND Diabetes AND Chemotherapy.” We did not establish any specific year range for this search. Out of 16,992 articles returned in our search, 953 articles were selected based on the following criteria: A peer-reviewed, original article published in an academic or professional journal of English or Japanese language whose participants were 19 years of age or older. After reading abstracts from 953 articles, 928 articles that did not report on patients with diabetes undergoing chemotherapy were excluded, which left us with 23 articles. After adding two articles found in-person, a total of 25 articles remained for analyses: 17 articles in English and 8 articles in Japanese [Figure 1]. A review matrix sheet with a table that listed the following items and topics was created to analyze the content and trend involving self-management, fluctuations in blood glucose levels, and adverse drug reactions to chemotherapy: The date of publication, survey country, research design, the purpose of the study, the type of study, attributes, cancer type, cancer stage, chemotherapy treatment plan (regimen), usage of steroids during chemotherapy, classification of diabetes mellitus, blood glucose, or glycated hemoglobin (HbA1c) levels, and the manifestation of adverse drug reactions. The first author (N.T) extracted the references for analysis, and then discussed and confirmed with the co-researcher (K.S) whether the extracted references were appropriate for analysis.
| Results|| |
Research overview of patients with diabetes undergoing chemotherapy
The overwhelming majority of the study designs were quantitative: 22 studies out of 25. Observational studies were the most common, with 14 cases. The study focus was as follows: Fluctuations in blood glucose levels during chemotherapy (n = 6), adverse drug reaction to chemotherapy (n = 13), and patient self-management (n = 6). The types of cancer observed in most participants were a combination of solid carcinoma and hematologic cancer. For those studies that specified the tumor location, four out of fourteen concerned breast cancer. On the other hand, the locations of tumors in other studies were diverse. Regarding cancer stage, studies that included stages I to IV (n = 9) and I to III (n = 3) were common. Only two studies specified one specific type of chemotherapy regimen while others either made no statement or involved a combination of various regimens. Most studies did not provide details of diabetes type, or blood glucose, or HbA1c levels. Participants were predominantly older: The average age of the participants from 18 studies was 60 years or older. The scale of the studies varied widely ranging from four to 14,000 participants; of 24 studies, 19 studies were small, with <100 participants [Table 1].
Fluctuations in blood glucose levels of patients with diabetes undergoing chemotherapy
All the participants in the reviewed studies had used steroids during chemotherapy. The highest recorded levels of blood glucose during chemotherapy were over 300 mg/dl., The surge in blood glucose levels occurred within a few hours of anticancer drug treatment, peaked at approximately 10 h, and dropped after 24 h. The mean fasting blood glucose level was significantly increased from 131.4 ± 37.2 mg/dl before treatment to 163.8 ± 52.3 mg/dl before breakfast on the day after treatment (P < 0.01). Hyperglycemia was detected in 80% of the 40 patients during the first course of chemotherapy and 60% during the fifth course. The achievement rate of glycemic control goals by steroid type was 54% for dexamethasone and 87% for prednisolone among 40 patients, with dexamethasone being significantly lower than prednisolone (P < 0.05). Significant positive correlations were identified (blood glucose: r = 0.697; HbA1c: r = 0.712; P < 0.01) between cumulative doses of dexamethasone and the increase in the levels of blood glucose and HbA1c. When cumulative doses of dexamethasone reached over 150 mg, significant increases in blood glucose and HbA1c levels were identified (P < 0.01).
Regarding hypoglycemia, that focused on type 2 diabetes mellitus patients who received Hyper-Cyclophosphamide Doxorubicin Vincristine and Dexamethasone Chemotherapy (Hyper-CVAD) to counter hypoglycemia, demonstrated that while blood glucose levels of several patients decreased to 70 mg/dl or lower, it did not fall <40 mg/dl. Furthermore, no studies to date report on patients who developed hypoglycemia who received similar treatment.
In response to fluctuations in blood glucose levels during chemotherapy, increased doses of oral antidiabetic and insulin preparations were administered and nonperiodic insulin injections were given.,,, Twenty percent of the patients' treatment plans were modified during chemotherapy. Type 2 diabetes mellitus patients who received Hyper-CVAD were administered with 1.2–1.3 units of insulin per 1 kg of body weight, and this dose was increased when the patients were overweight. A sliding scale method which determines the dosage of insulin based on blood glucose levels was used for patients who received periodic insulin doses. The treatment plan for approximately half of the patients was changed by adjusting the dosage or type of antidiabetic drug; as the cumulative dose of dexamethasone was increased in these patients, levels of their blood glucose and HbA1c rose correspondingly. Even with a small dose of prednisolone, some cases required an active increase in insulin dose.
Adverse drug reaction to patients with diabetes undergoing chemotherapy
There were 13 studies on side effects seen in patients with diabetes undergoing chemotherapy, the main ones were as follows: Peripheral nerve disorder, 6 cases; infectious, 3 cases; oral mucositis and heart failure, 1 case; nonspecific, 2 cases.
Peripheral nerve disorder
In studies with more than 50 patients, patients with a medical history of diabetes comprised approximately 60%–80% of those patients who manifested peripheral nerve disorder. , In particular, 52% of patients with diabetes for <5 years and 75% of patients with diabetes for more than 5 years developed peripheral nerve disorder. The incidence of peripheral nerve disorder was higher among patients with diabetes with the duration of five or more years than for those counterparts with <5 years (P < 0.01). On the other hand, a study with <30 patients reported that there was a nonsignificant correlation between the presence of diabetes and clinical grading of peripheral nerve disorder. The degree of symptoms ranged from Grade 2 to Grade 3 in the Common Terminology Criteria for Adverse Events,, and the symptoms progressively worsened after each chemotherapy treatment., However, studies with fewer than 30 patients, reported that there was a nonsignificant correlation between the presence of diabetes and clinical grading of peripheral nerve disorder. It was difficult to distinguish whether the peripheral nerve disorder was caused by worsening diabetes or the side effects of chemotherapy, and some patients were confused.
Moreover, the likelihood of symptom emergence was significantly higher after the fifth course for patients with diabetes who received chemotherapy with oxaliplatin. The only symptom of peripheral nerve disorder that emerged was sensory neuropathy.
There were no significant differences in the occurrence of peripheral nerve disorder between patients with or without diabetes when taxane-only chemotherapy was applied. Regimens that were significantly more likely to occur in patients with diabetes were those that included taxanes and platinum, FOLFOX4 (5-fluorouracil, leucovorin, oxaliplatin), and oxaliplatin.,, The cumulative dose of oxaliplatin at the onset of symptoms was 388 mg/m2; even with a small dose, peripheral nerve disorder emerged in patients with diabetes.
In a study of patients who received intravenous chemotherapy with steroids, the probability of new infection was increased by 68% in those patients with diabetes compared to counterparts without diabetes. In addition, the rate of hospitalization for infection during the 1st year after initial chemotherapy was 37.0% in patients with diabetes and 29.2% in patients without diabetes, within 1 year after receiving their first chemotherapy, the admission rate to the hospital was about 8% higher for patients with diabetes (P < 0.01). Alkylating agent chemotherapy was the primary factor contributing to infectious disease in these patients. The highest onset of risk factors was observed in diabetes with high blood pressure or tube feeding., None of the following were associated with the onset of infectious disease: HbA1c level, cancer stage, age, and gender.
Chemotherapy-induced oral mucositis occurred in 5.9% of patients without diabetes and 6.9% of patients with diabetes, with significantly more patients with diabetes developing the disease compared to patients without diabetes (P < 0.05).
Other side effects or adverse drug reactions
Patients with diabetes tend to develop severe anorexia, nausea, and physical weariness. In a study that investigated patients' symptoms during chemotherapy using The Symptoms of Illness Checklist, which consists of 33 items, symptoms during chemotherapy in patients with diabetes were significantly more severe 8 weeks after the start of chemotherapy compared to before. Among patients aged 66 years or older receiving adjuvant chemotherapy for breast cancer, more patients with diabetes were hospitalized outside the treatment period (32.7%) and patients without diabetes (25.1%) (P < 0.01). The reasons for hospitalization were infection, neutropenia, and anemia. Diabetes was a predictor for the onset of heart failure for those patients with breast cancer undergoing chemotherapy.
Self-management for patients with diabetes undergoing chemotherapy
Some patients with diabetes undergoing chemotherapy responded that they wished to concentrate on treatment for both cancer and diabetes although other patients solely focused on cancer treatment simply because “killing two birds with one stone” was not feasible., Self-management of diabetes among patients with diabetes undergoing chemotherapy who developed solid tumors was investigated with the Self-care Inventory-Revised (SCI-R), which examines patients' attitudes toward adherence to self-care recommendations regarding diabetes, and the results showed that patients with diabetes' self-management of diabetes decreased significantly 8 weeks after the start of chemotherapy (P < 0.01). Hindering factors included: Physical weariness, nausea, change in the sleep cycles, degrees of severity in symptoms, and unavailability of advice from medical staff about dietary intake with diabetes in mind., Specifically, physical weariness and nausea prevented optimal dietary intake and implementation of exercise therapy. Other obstacles included: Hyperphagia due to steroids, the fact that the patient was recommended to eat anything regardless of fluctuations in blood glucose, and the challenge associated with oral administration of hypoglycemic agents when suffering from nausea. Some patients had difficulty in performing self-monitoring of blood glucose because of peripheral neuropathy. This naturally raised a question regarding the traits of patients whose implementation rates for diabetes self-management were high even at 8 weeks into chemotherapy. The profile of such patients included: Disease duration for diabetes was long, self-efficacy and levels of expected outcome were high, control of blood glucose levels after chemotherapy were excellent, and the number of prescribed drugs was few. , The differences in SCI-R by cancer site were not clarified.
| Discussion|| |
Research trend concerning patients with diabetes undergoing chemotherapy
Most of the studies on patients with diabetes during chemotherapy were related to the frequency and severity of symptoms of adverse effects of chemotherapy, especially peripheral neuropathy and infection. However, most of the studies did not analyze the frequency and severity of side effect symptoms for each chemotherapy regimen received by the subjects. The risk of emetic and peripheral nerve disorder differs depending on the type of anticancer drug used., Therefore, a regimen-specific analysis is needed in the future. The only study of glycemic variability was in patients with diabetes undergoing chemotherapy with steroids. Because of the variety of steroids administered and the lack of clarification of the status of blood glucose control before chemotherapy, future studies are needed to standardize the conditions of the subjects and to include the status of blood glucose control before chemotherapy in the survey items.
Fluctuations in blood glucose levels of patients with diabetes undergoing chemotherapy
Multiple studies show that blood glucose levels in patients with diabetes increase more than 300 mg/dl after undergoing chemotherapy., Elevated blood glucose levels have the potential to detract from the beneficial effects of chemotherapy. Furthermore, when blood glucose levels exceed 250 mg/dl, the risk of diabetic ketoacidosis, an acute complication of diabetes, is increased, thereby causing dehydration and a reduction in blood pressure. Moreover, if such elevated blood glucose persists, it could lead to other complications of diabetes. Thus, the prevention of elevated blood glucose levels is of paramount importance for patients with diabetes undergoing chemotherapy. Despite its relevance to the treatment of this group of special needs patients, there is no consensus on the appropriate glycemic control target for patients with diabetes undergoing chemotherapy. Therefore, accurate blood glucose control, responsive to the unique fluctuation of blood glucose levels of each patient, is indispensable.
Another challenge for patients with diabetes undergoing chemotherapy lies in the common inclusion of the steroids prednisolone and dexamethasone. There is a clear difference between prednisolone and dexamethasone's half-life in the blood, at 2.5 h and 3.5 h, respectively. Therefore, the remaining effect of elevated blood glucose from the previous day makes the control of blood glucose levels challenging, especially when therapy includes a daily administration of dexamethasone. To respond to this challenge, the identification of patient-specific steroids and assessment of their blood glucose level fluctuation before the commencement of chemotherapy should never be overlooked.
Other strategies for minimizing fluctuation in blood glucose levels during chemotherapy include increasing the dose of oral antihyperglycemic agent and insulin or scheduling extra administration of insulin. However, by performing such strategies, it is apparent that the risk of hypoglycemia will also be magnified. Nevertheless, the extant literature, containing a small sample size of fewer than 40 patients, reports either mild cases of hypoglycemia in a few patients or no hypoglycaemia. Due to these missing details, for those drugs with an antihyperglycemic effect used in the aforementioned studies, further acquisition of data concerning hypoglycemia during chemotherapy is warranted.
Side effects that emerged in patients with diabetes undergoing chemotherapy
Compared to patients without diabetes undergoing chemotherapy, some studies show that patients with diabetes undergoing chemotherapy are more likely to manifest peripheral nerve disorder.,, Peripheral nerve disorder is a notable side effect that warrants the undivided attention of all medical staff involved in the treatment of patients with diabetes undergoing chemotherapy. Peripheral nerve disorder is highly likely if hyperglycemia persists. Furthermore, because steroids are involved in chemotherapy, patients with diabetes are prone to developing hyperglycemia during this treatment. Consequently, the time at which the steroid is introduced becomes the turning point, when peripheral nerve disorder is induced in patients with diabetes.
The following secondary physical disabilities or symptoms are likely to occur in patients with diabetes who develop peripheral nerve disorder: Inability to perform grip actions or actions in minute detail, aching pains caused by cold stimulation, and instability while walking. Such development of peripheral nerve disorders, particularly in patients with diabetes, that are caused by chemotherapy raise a variety of concerns. First, the risk of not being able to conduct blood sugar determination or perform insulin self-injection becomes pronounced due to a weakened grasp on a blood glucose meter or tools used for insulin self-injection. Second, patient distress could soar from the cold stimulation-induced pain they experience every time they disinfect themselves with alcohol when conducting blood sugar determination. Thirdly, owing to their poorer gait while standing or walking, caused by peripheral nerve injury in the lower extremity, the risk of falling during exercise rehabilitation increases; fear of this may prevent such patients from participating in rehabilitation.
These concerns all point to the need for assistance in self-management against peripheral nerve disorder for patients with diabetes, especially from an early stage of chemotherapy. Several studies,, demonstrate that the severity of symptoms is likely to be heightened when patients with diabetes undergoing chemotherapy receive a regimen comprising a combination of taxane and the platinum anticancer drugs, FOLFOX4, and oxaliplatin. These drugs are known to induce the development of peripheral nerve disorder. It is therefore essential for medical professionals to carefully assess the presence of peripheral nerve disorder before the commencement of chemotherapy or the introduction of those drugs. How symptoms of peripheral nerve disorder manifest in patients with diabetes at an early stage of chemotherapy and how the severity of their symptoms affect the quality of their daily lives, along with their self-management, must be clarified through a systematic assessment. This is crucial, because, when compared to patients without diabetes, patients with diabetes undergoing chemotherapy are more susceptible to infection.
Self-management of patients with diabetes undergoing chemotherapy
Literature shows that patients with the following characteristics demonstrate superior self-management of diabetes while undergoing chemotherapy: A longer diabetes disease duration,, high self-efficacy for blood glucose control, well-managed blood glucose levels before chemotherapy, and a lower number of drugs per prescription. This underscores the importance of patient support that acknowledges the patient's record and their ability for blood glucose control. Still, owing to the limited number of currently available studies, the real state of self-management among patients with diabetes undergoing chemotherapy is yet to be investigated. Further studies addressing the management of the side effects of chemotherapy and blood glucose level control in patients with diabetes undergoing chemotherapy should provide a basis for developing appropriate support programs of self-management for this group of special needs patients.
Although this review makes an important contribution to our understanding of fluctuations in blood glucose levels in each regimen of chemotherapy for patients with diabetes, the overview gained from the literature was limited by missing details in diabetes or cancer information. This prevented us from assembling a meta-analysis of changes in blood glucose levels for each chemotherapy regimen or the effect of various doses of steroids on blood glucose levels. In addition, we could not determine at which phase of chemotherapy the symptoms appeared because there was no information on the observation period, although the symptoms appeared differently with time. Finally, there remains the possibility that not all cases have been considered since our review only focused on papers written in English or Japanese languages.
| Conclusions|| |
Patients with diabetes undergoing chemotherapy were given increased doses of hypoglycemic agents or additional doses of hypoglycemic agents to control their blood sugar because of hyperglycemia. Compared to patients without diabetes, patients with both cancer and diabetes are burdened with a higher risk of developing side effects of chemotherapy, particularly peripheral nerve disorder and infectious diseases; both unwanted side effects are more likely to become severe among patients with diabetes than those without. The fact that infectious diseases could prove fatal and that peripheral nerve disorders tend to worsen, lead to a substantial deterioration in patient quality of life. This underscores the importance of timely support for this rapidly emerging group of special needs patients with cancer. Unequivocally, there is an urgent need for a support program based on systematic research that clarifies strategies for the control and self-management of blood glucose levels and adverse drug reactions in patients with diabetes undergoing chemotherapy. Such an endeavor would assist this group of special needs patients who are suffering from two of the most prevalent modern diseases: Diabetes and cancer.
Financial support and sponsorship
This work was supported by JSPS KAKENHI (Grant No. 20K19054).
Conflicts of interest
There are no conflicts of interest.
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